filename: A filename that can be used to store the data
to a local or remote file system.

path: The name of a directory that can be used to store
the data to a local or remote file system.

uuid: A Universally Unique Identifier that
distinguishes the FlowFile from other FlowFiles in the system.

entryDate: The date and time at which the FlowFile
entered the system (i.e., was created). The value of this attribute is a number that
represents the number of milliseconds since midnight, Jan. 1, 1970 (UTC).

lineageStartDate: Any time that a FlowFile is cloned,
merged, or split, this results in a "child" FlowFile being created. As those
children are then cloned, merged, or split, a chain of ancestors is built. This value
represents the date and time at which the oldest ancestor entered the system. Another
way to think about this is that this attribute represents the latency of the FlowFile
through the system. The value is a number that represents the number of milliseconds
since midnight, Jan. 1, 1970 (UTC).

fileSize: This attribute represents the number of bytes
taken up by the FlowFile's Content.

Note that the uuid, entryDate,
lineageStartDate, and fileSize attributes are
system-generated and cannot be changed.